I prefer the proper scope over an apperature sight. Having the target and sighting device all on the same sight plane and increased light gathering ability are the primary reasons for my choice. The apperature sight has some benefits though. They are light and do not upset the balance of the rifle and are potentially more rugged than a scope. I think they are both fairly even in the speed on target catagory if one has an appropriate scope for the range and knows how to properly find the target with a scope. uglydog